Metallic bung closure with protective plastic layer
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United States of America Patent
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Aug 8, 2017
Grant Date -
Apr 9, 2015
app pub date -
Apr 23, 2013
filing date -
Apr 23, 2012
priority date (Note) -
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Abstract
A bung closure for gas-tight and liquid-tight closure of a bung opening of a container, includes a cup-shaped basic body made from metal and having a disk-shaped base and an adjoining, upwardly open, tubular ring part; at least one interlocking element in the form of a shaped sheet-metal strip or a tab provided within the cup-shaped basic body for engagement with a screwing tool for screwing the bung closure into, and out of the bung opening of the container; and a stable plastics layer provided on the outer side of the ring part, with an external thread formed on an outside of the plastics layer for threaded engagement with the internal thread of the bung opening.
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